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We consider the problem of spectrum sensing in cognitive radio networks. In our previous work we have developed DualCUSUM, a distributed algorithm for change detection and used it for cooperative spectrum sensing. The algorithm is based on sequential change detection techniques which optimally use the past observations. But DualCUSUM requires the knowledge of the channel gains for each of the secondary...
ICT has a large potential to be useful in health care. While hospitals are now often equipped with advanced tools using digitized analysis and embedded technology for operations etc., IT based administrative tools used to coordinate activities and communicate knowledge in the area of health care have not yet been generalized. The effect of these IT/ICT tools on the life of people world over has been...
Tuning of the PID controller in a varying environment is extremely difficult. For this purpose one has to use the adaptive PID controller. In the present paper a novel method for fast tuning of the PID controller has been presented and implemented on designed and developed hardware around the 89C51 microcontroller. Varying environment in the very old existing MLW-MK70, former East German bath has...
A fully computer controlled system has been designed and developed for measuring the density of solids by hydrostatic weighing method. The hardware of the system has been developed around 89C51 microcontroller. In this setup density of the unknown sample is determined with the help of mean density of the two solid density standards. The overall uncertainty has been obtained to be of the order of 0...
We study sensor networks with energy harvesting nodes. The generated energy at a node can be stored in a buffer. A sensor node periodically senses a random field and generates a packet. These packets are stored in a queue and transmitted using the energy available at that time at the node. For such networks we develop efficient energy management policies. First, for a single node, we obtain policies...
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